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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 580 (1990), S. 151-159 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Layer-Anions in the Crystal Structures of the Isotypic Compounds Sr2[Ga2S5], Ba2[In2S3], and Ba2[In2Se5]The compounds Sr2[Ga2S5], Ba2[In2S5], and Ba2[In2Se5] have been prepared from stoichiometric mixtures of the elements at temperatures between 1150°C and 1250°C. They are isotypic (space group Pbca, Z = 8) with the lattice constants see „Inhaltsübersicht“. In the anionic part of the structure GaS4-(InS4-/InSe4)-tetrahedra share three common vertices to form layers with rings built by four and eight tetrahedra. The cations are placed between the sheets and have the coordination number seven.
    Notes: Die Verbindungen Sr2[Ga2S5], Ba2[In2S5] und Ba2[In2Se5] wurden aus stöchiometrischen Gemischen der Elemente bei Temperaturen zwischen 1150°C und 1250°C dargestellt. Sie kristallisieren zueinander isotyp (Raumgruppe Pbca, Z = 8) mit den Gitterkonstanten Sr2Ga2S5 a = 1252,3(6) pm, b = 1203,4(6) pm, c = 1118,0(5) pm; Ba2In2S5 a = 1316,7(6) pm, b = 1272,3(6) pm, c = 1178,4(5) pm; Ba2In2Se5 a = 1365,7(6) pm, b = 1318,2(6) pm, c = 1222,5(5) pm. In der Anionenteilstruktur sind GaS4(InS4/InSe4)-Tetraeder über drei gemeinsame Ecken zu unendlich ausgedehnten Netzen verknüpft, in denen Ringe aus vier und acht Tetraedern vorliegen. Die Kationen befinden sich zwischen den Schichten und erreichen die Koordinationszahl sieben.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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